Malacostraca | 
Decapoda | 
Upogebiidae
			
			
			
				Environment: milieu / climate zone / depth range / distribution range				
				
					Ecology				
				
			
			
				Benthic; brackish; depth range 0 - 1 m (Ref. 4).  Temperate, preferred 9°C (Ref. 107945); 62°N -   35°N, 152°W -   120°W (Ref. 4)			
			
			
				
			
			
			
				Eastern Pacific:  Prince William Sound, Alaska to Morro Bay, California, USA.
			
			
			
			
			
				Length at first maturity / Size / Weight / Age
			
			
				Maturity: Lm ?  range ? - ? cm Max length : 15.0 cm TL male/unsexed; (Ref. 4); 10.5 cm TL (female)			
			
			
							
				
				
					
						Rostrum ending in three teeth, the median tooth broad and triangular, the lateral teeth much shorter.  A groove between the median and lateral teeth, also a very shallow median longitudinal groove.  Lower surface of rostrum without spines.  Anterolateral border of carapace with a very small tooth at the level of the eye.  First pereiopods subchelate.  Dactylus of adult male on inner surface with a longitudinal row of 6-12 tubercles, that are placed close together.  Carpus with some anterior spines.  Merus with a subdistal anterodorsal spine (Ref. 4).					
				
				
						
			
			
			
			
				
					It has lengths of 11 cm, total body length (Ref. 259); 15 cm (males) and 10.5 cm (females), total length (Refs. 4, 258). It burrows in muddy sand of the intertidal zone, sometimes under rocks; burrows are Y-shaped, and about 0.6 to 1 m deep (Ref. 4).  Found in bays and estuaries (Ref. 112892).				
			
			
			
			
			
				Life cycle and mating behavior				
					Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae				
			
			
				
					Members of the order Decapoda are mostly gonochoric.  Mating behavior:  Precopulatory courtship ritual is common (through olfactory and tactile cues); usually indirect sperm transfer.  				
			
			
			
			
			
				Holthuis, L.B. 1991 FAO Species Catalogue. Vol. 13. Marine lobsters of the world. An annotated and illustrated catalogue of species of interest to fisheries known to date. FAO Fish. Synop. 125(13):292p. Rome: FAO. (Ref. 4)
			
			
			
			
			
			
			
					
						IUCN Red List Status    
						 (Ref. 130435: Version 2025-1)
					
					
					
				
			
			
			
			
				CITES status   (Ref. 108899)
			
			
				
					Not Evaluated				
			
			
			
			
			
			
				
					Not Evaluated				
			
			
			
			
			
				Threat to humans  
			
			
				
									
			
			
			
			
			
			
			
			
				Human uses  
			
			
				Fisheries: commercial; bait: occasionally			
			
			
				FAO - Fisheries: landings | FishSource | Sea Around Us			
			
			
			
			
			
Tools
			
			
			
			
				
					More information				
				
					 Population dynamicsGrowth
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Abundance
  Human RelatedStamps, coins, misc.
  
			 
			
			
			
				Internet sources
			
			
			
			
			
				Estimates based on models
			
			
			
									
						Preferred temperature  					
				 (Ref. 
115969): 8.4 - 12.8, mean 9.8 (based on 197 cells).			
 
			
			
			
			
			
						
							
				
					
						Fishing Vulnerability  					
					
					
						Low vulnerability (10 of 100).					
				
						
							
					
						Climate Vulnerability  					
					
					High to very high vulnerability (71 of 100).				
						
			
			
			
				Nutrients  :  Calcium = 109 [35, 184]  mg/100g; Iron = 1.59 [1.21, 1.97]  mg/100g; Protein = 20.2 [19.2, 21.3] %; Omega3 = 0.285 [0.185, 0.386]  g/100g; Selenium = 48.3 [-31.7, 128.3]  μg/100g; VitaminA = 0 μg/100g; Zinc = 1.79 [1.17, 2.40]  mg/100g (wet weight); based on 
nutrient studies.